package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        password = DigestUtils.md5DigestAsHex(password.getBytes()); // 密码转换成md5加密
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /*新增员工方法*/
    @Override
    public void save(EmployeeDTO employeeDTO) {
        //对象的转换
        Employee employee = new Employee();
        //复制基本属性到employee 实体类中
        BeanUtils.copyProperties(employeeDTO, employee);
        //设置employee实体类其它基本属性
        employee.setStatus(StatusConstant.ENABLE);
        String password = DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes());
        employee.setPassword(password);
        /*
        //设置时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        // 设置当前操作人id
        // 获取ThreadLocal中的操作人id
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());
        */
        // 调用Mapper层实现数据写入
        employeeMapper.insert(employee);
    }

    /*员工分页查询方法*/
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        // 使用pageHelper插件实现分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize()); // 设置分页查询参数
        // 调用Mapper层实现查询
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        // 获取page对象的查询结果
        long total = page.getTotal();
        List<Employee> employeeList = page.getResult();
        // 封装成pageResult对象返回给Controller层
        PageResult pageResult = new PageResult(total, employeeList);
        return pageResult;
    }

    @Override
    public void enableOrBan(Integer status, Long id) {
        // 调用mapper层方法 实现更新状态操作,调用更新方法,只对这两个字段进行设置即可
        Employee employee = Employee.builder().status(status).id(id).build(); //  = new employee对象
        System.out.println("employee = " + employee);
        // 调用mapper层
        employeeMapper.update(employee);
    }

    /*根据员工id查询员工*/
    @Override
    public Employee getEmployeeById(Long id) {
        // 调用mapper层查询员工
        Employee employee = employeeMapper.getEmployeeById(id);
        // 密码脱敏处理
        employee.setPassword("******");
        return employee;
    }

    //更新员工信息方法
    @Override
    public void update(EmployeeDTO employeeDTO) {
        // 把DTO对象转换成实体数据库表实体对象
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        /*
        employee.setUpdateUser(BaseContext.getCurrentId()); // 记录当前操作人id
        employee.setUpdateTime(LocalDateTime.now()); // 记录当前操作时间
         */
        // 调用mapper层对象
        employeeMapper.update(employee);
    }

}
